
		body
		{
			background:url(img/5.jpg);
			/*背景铺满屏幕*/
			background-size: 100%;
			animation-name: login_style;
			animation-duration: 20s;
			animation-delay: 0s;
			animation-iteration-count: infinite;
			animation-play-state: running;
		}
		@keyframes login_style
		{
			0%
			{
				background: url(img/1.jpg);
				background-size: 100%;
			}
			25%
			{
				background: url(img/2.jpg);
				background-size: 100%;
			}
			50%
			{
				background: url(img/3.jpg);
				background-size: 100%;
			}
			75%
			{
				background: url(img/4.jpg);
				background-size: 100%;
			}
			100%
			{
				background: url(img/5.jpg);
				background-size: 100%;
			}
			


	.form{
			background: rgba(255,255,255,0.6);
			width : 300px;
			margin : 120px auto;
			position: center;
			left: 100px;
			top: 200px;
		}
	.checkbox{
            padding-left:21px;
	}
	 h1
	{
		color: white;
	}
	
	title
	{
		text-align: center;
	}